A drying machine includes a hot air blower, a housing divided horizontally into plural long chambers having an open upper side, a closed bottom and two longitudinal sides bored with through holes, a screw conveyor respectively positioned in each long chamber, and a motor to rotate all the screw conveyors,...http://www.google.fr/patents/US6128828?utm_source=gb-gplus-shareBrevet US6128828 - Drying machine
